Posen man on foot killed on I-57

A pedestrian killed Thursday evening while crossing Interstate Highway 57 near the Sibley Boulevard interchange near Harvey was identified this morning as a 47-year-old Posen man.

Lawrence Ulmenstine of the 14200 block of South Harrison Avenue was struck and killed, the Cook County medical examiner's office said.

An Illinois State Police trooper said a vehicle traveling north in the left lane of I-57 about 5:25 p.m. struck the pedestrian, who was trying to cross the interstate east-to-west about 500 feet south of 147th Street.

All inbound lanes of I-57 were closed for more than two hours during the investigation, the trooper said.

Officials were still trying to determine why the pedestrian was on the interstate; the possibility of suicide has not been ruled out, the trooper said.